如何使用PowerPoint Add-in将文本添加到PowerPoint主页？(Office.js)

<script src="https://appsforoffice.microsoft.com/lib/1/hosted/office.js" type="text/javascript"></script>

<button id="addTextButton">添加文本</button>

<script type="text/javascript">
    Office.initialize = function () {
        // 当Office.js加载完成后执行的初始化函数
        document.getElementById("addTextButton").onclick = addTextToSlide;
    };

    function addTextToSlide() {
        PowerPoint.run(function (context) {
            // 获取当前选中的幻灯片
            var slide = context.presentation.slides.getActiveSlide();

            // 在幻灯片上添加一个文本框
            var textBox = slide.shapes.addTextBox(100, 100, 200, 100);
            textBox.text = "这是一个文本框";

            return context.sync();
        })
        .catch(function (error) {
            console.log(error);
        });
    }
</script>

<?xml version="1.0" encoding="UTF-8"?>
<OfficeApp xmlns="http://schemas.microsoft.com/office/appforoffice/1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="Presentation">
  <Id>xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx</Id>
  <Version>1.0.0.0</Version>
  <ProviderName>Your Provider Name</ProviderName>
  <DefaultLocale>en-US</DefaultLocale>
  <DisplayName DefaultValue="Your Add-in Name" />
  <Description DefaultValue="Your Add-in Description" />
  <IconUrl DefaultValue="https://your-addin-icon-url.png" />
  <SupportUrl DefaultValue="https://your-addin-support-url" />
  <AppDomains>
    <AppDomain>https://your-addin-domain.com</AppDomain>
  </AppDomains>
  <Hosts>
    <Host Name="Presentation" />
  </Hosts>
  <DefaultSettings>
    <SourceLocation DefaultValue="https://your-addin-domain.com/your-addin.html" />
  </DefaultSettings>
</OfficeApp>